I have this problem on my facelifted 2004 ZT-T and I've been trying to find the time to sort the problem. In a few weekends time, my wife is going down to her sisters so I can spend some time working on the problem withhout hearing "what you doing?" every 5 minutes, and concentrate on it!
I'm going to start with the cable tie route to see if I can break the wave form up and reduce or get rid of the whine. I'm working out in Italy at the moment with a diesel manufacturer and I'm going to see if they can suggest anything before I leave or have anything that I could try in my system to damp, or remove the wave form.
Would be interested to hear how people progress with their investigations.
Nic
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